Please Help! my fish have been scratching on everything for the past 4 months! no signs of illness, just scratching! all of my test like ammonia, Nitrate, Nitrite, PH levels are all normal! they are in a 135G freshwater tank. Temp. is 73F. all fish are eating well and have no other problems besides scratching.
What could it be?!?!?!:help:
What could it be?!?!?!:help: